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Chemical Equations

Total questions: 65

Worksheet time: 2hrs 53mins

Name
Class
Date
1.

What is the left part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical equation

2.

What is the right part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical Equation

3.

What is the total number of atoms present in 5Na3PO4?

a)

5

b)

55

c)

40

d)

8

4.

What is the little number after an element in a chemical equation called?

Example: H2

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

5.

What is the number before a chemical formula called?

Example: 2H2 + O2 ---> 2H2O

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

6.

Which of the following equations are correctly balanced?

a)

12CO2 + H2O ---> C6H12O6 + O2

b)

CO2 + H2O ---> 3C6H12O6 + O2

c)

CO2 + 9H2O ---> C6H12O6 + O2

d)

6CO2 + 6H2O ---> C6H12O6 + 6O2

7.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

8.

What is the Law of Conservation of Mass?

a)

It states that matter cannot be created or destroyed.

b)

It states that energy cannot be created or destroyed.

c)

It states that matter can be created or destroyed.

d)

It states that sound can be created or destroyed.

9.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
10.

When balancing this equation, Fe + Cl2 → FeCl3, the correct coefficient for Cl2?

a)

1

b)

2

c)

3

d)

4

11.

The products of a reaction have the same ________as the reactants.

a)

molecule

b)

atoms

c)

subscripts

d)

coefficients

12.

Chemical reactions

a)

create and destoy atoms

b)

only occurs outside living organisms

c)

occurs only in living organisms

d)

produce new substances

13.

What does this symbol Δ above the arrow mean?

a)

a precipitate is form

b)

heat is supplied

c)

a calalyst is needed

d)

electricity is needed

14.

Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?

a)

3,1,2

b)

1,1,1

c)

1,3,1

d)

2,6,3

15.

Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl

a)

3,1,3,1

b)

1,3,3,1

c)

1,1,1,3

d)

1,3,1,3

16.

Chemical equations

a)

give directions for naming compounds

b)

describe only biological changes

c)

describe chemical reactions

d)

show how to write formulas

17.

What state of matter is this substance?

a)

solid

b)

liquid

c)

gas

d)

aqueous

18.

In what state is this substance?

a)

solid precipitate

b)

dissolved in water

c)

released as a gas

d)

liquid

19.

How many atoms of nitrogen are present in this molecule?

a)

1

b)

2

c)

3

d)

4

20.

Which compound is formed as a precipitate in this reaction?

a)

Pb(NO3)2

b)

KI

c)

PbI2

d)

KNO3

21.

What does the symbol inside the circle mean?

a)

"yields, or produces"

b)

"dissolved in water"

c)

"forms a precipitate"

d)

"released as a gas"

22.

Is the compound in the pink box a Reactant or a Product?

a)

Reactant

b)

Product

23.

How many molecules of KNO3 are shown?

a)

1

b)

2

c)

3

d)

4

24.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

25.

Based on the activity series, will this reaction occur?

Au (s) + HCl (l) →

a)

AuCl + H

b)

No Reaction

c)

AuCl + H2

d)

Au2Cl + H2

26.

What will be the result of the following:

LiBr + Na --->

a)

Li will replace Na

b)

Na will replace Br

c)

Na will replace Li

d)

no reaction will occur

27.

What will be the result of : Zn + AuCl2->

a)

ZnCl2 +Au

b)

ZnAu + Cl2

c)

no reaction

d)

ClAu + Zn

28.

Predict the products of the following equation.

PbCl2+ AgNO3 =>

a)

AgCl(s) + Pb(NO3)2(aq)

b)

No Reaction

c)

AgCl(aq) + Pb(NO3)2(s)

d)

AgCl(s) + PbNO3(aq)

29.

Predict the products:

NaOH + Fe(NO3)3 →

a)

NaFe(s) + OH(NO3)3(aq)

b)

NaNO3(s) + Fe(OH)3(s)

c)

No reaction

d)

NaNO3(aq) + Fe(OH)3(s)

30.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

31.

What type of reaction involves 2 substances combining to form 1 new compound?

a)

Decomposition Reaction

b)

Single Replacement Reaction

c)

Double Replacement Reaction

d)

Synthesis Reaction

32.

What type of reaction involves one element replacing another element in a compound?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

33.

What type of reaction involves ions from 2 compounds exchanging places to form 2 completely new compounds?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

34.

What are the reactants in the chemical equation pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

35.

What type of chemical reaction is this one?

Al(OH)3 --> Al2O3 + H2O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

36.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

37.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

38.

3KOH + H3PO4 --> K3PO4 + 3H2O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

39.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
40.

When Lead Nitrate reacts with potassium iodide, Yellow precipitate of ............. is formed

a)

PbI2

b)

KNO3

c)

Pb(NO3)2

d)

PbIO3

41.

Predict the products for this substance: Al2O3 → ? + ?

a)

Al + O2

b)

O2 + Al3

c)

Al2 + O3

d)

Al + O

e)

Al3 + O

42.

If Ethylene (C2H4) reacts with Oxygen gas in a chemical reaction, what are the products?

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H2

d)

CO2 + H2O

43.

Barium Bromide reacts with Lithium Phosphate to yield Lithium Bromide and Barium Phosphate. What substance forms the precipitate in this reaction?

a)

Lithium Phosphate

b)

Lithium Bromide

c)

Barium Bromide

d)

Barium Phosphate

44.
What are the products of this reaction?
Cu+ AgNO3--> 
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
45.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
46.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
47.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
48.

What are the correct formulas and coefficients for the products of the following single-replacement reaction?

Ag + K2SO4 →

a)

No Reaction

b)

K2 + AgSO4

c)

2K + Ag(SO)4

d)

2K + AgSO4

49.
What is a precipitate?
a)
A solid formed from a single replacement reaction
b)
An aqueous compound formed from single replacement reaction 
c)
An aqueous compound formed from double replacement reaction
d)
A solid formed from a double replacement reaction
50.
What is the state of matter symbol for an insoluble compound?
a)
(s)
b)
(aq)
c)
(g)
d)
(l)
51.

What is the state of matter symbol for a soluble compound?

a)

(s)

b)

(aq)

c)

(g)

d)

(l)

52.

Zinc carbonate, ZnCO3 is...

a)

Soluble

b)

Insoluble

53.

KBr (potassium bromide) is...

a)

Soluble

b)

Insoluble

54.

The cation in H2SO4 is

a)

H2

b)

H+

c)

SO42-

d)

O4

55.

The anion in NaC2H3O2 is

a)

Na+

b)

O2-

c)

C2H3O2-

d)

Na-

56.

Predict the results of this reaction: NH4Cl + KOH →\rightarrow  

a)

NH4OH + KCl

b)

N(OH)3 + KH4Cl

c)

ClOH + KNH4

d)

No Reaction

57.
All combustion reactions are 
a)
endothermic
b)
exothermic
c)
neutral
d)
fast
58.

True/False: There are 2 reactants in the chemical equation below.
KClO3 → KCl + O2KClO_3\ \rightarrow\ KCl\ +\ O_2  

a)

True

b)

False

59.

Translate the word equation below.

Hydrogen and Carbon Dioxide react to form Carbonic Acid (H2CO3).

a)

H + CO2 → H2CO3H\ +\ CO_2\ \rightarrow\ H_2CO_3

b)

H → CO2 + H2CO3H\ \rightarrow\ CO_2\ +\ H_2CO_{3_{ }}

c)

H2 + CO2 → H2CO3H_2\ +\ CO_2\ \rightarrow\ H_2CO_3

d)

H2 → CO2 + H2CO3H_2\ \rightarrow\ CO_2\ +\ H_2CO_3

60.
Which is the correct name for the compound Na3P?
a)
Sodium Phosphide
b)
Sodium Phosphite
c)
Sodium Phosphate
d)
Sodium (III) Phosphide
61.
Which is the correct formula for the compound Chromium (II) Nitrate?
a)
Cr2NO3
b)
(Cr)2NO3
c)
CrNO2
d)
Cr(NO3)2
62.
Which type of chemical reaction is shown?
a)
double replacement
b)
composition
c)
combustion
d)
decomposition
63.
What is the molar mass of hydrogen peroxide (H2O2)?
a)
9 g/mol
b)
17 g/mol
c)
18 g/mol
d)
34 g/mol
64.
Which compound contains both covalent and ionic bonds?
a)
CaCO3
b)
CO2
c)
H2O
d)
NaCl
65.
What is the correct name for the acid whose chemical formula is H2SO4?
a)
hydrosulfuric acid
b)
hydrosulfurous acid
c)
sulfurous acid
d)
sulfuric acid

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